Pressing machine



Oct 24 l950 l.. o. BECKER PREssING MACHINE Filed sept. 12, 1947 Patented Oct. 24, 1950 `OFFICE PRESSING MACHINE Lester-0. Becker, St. Louis, Mo., assigner to Joseph .Pavelka, St. Louis, Mo.

Application September 12, 1947, Serial No. 773,538

15 Claims.

The invention relates to pressing :machines `rof the kind described in Patent No. 2,407,468, issued 'September 10, 1946, to the present inventor, and has as an object to provide a device `whereby Aa powerful vthrust maybe exerted with relatively ysmall applied force. The device may be used in various pressing operations, such as :punching-and bending rails, swaging, forming, cutting and ysimilar operations.

Pressing machines as lused heretofore required considerable manual strength to provide ya thrust sufi-"icient to punch holes in rails. When the punch broke through the rail, Ithe applied `force lsuddenly was unresisted, and the operator applying the force might fall and be injured. The force applied to the present device when punching rails is so small that when the punch breaks through the rail, the sudden release of the punch 'is hardly noticeable to the operator.

This and other detail objects of the invention vas will appear below are attained by the structure shown in the accompanying drawings which structure is intended to be illustrative, but 'not exclusive, of other arrangements embodying the general inventive principles.

In the drawings,

Figure 1 is a top View of a portable rail punch embodying the invention.

Figure 2 is a side elevation, partly in section, of the device shown in Figure 1.

Figure 3 is an end View thereof.

Figures 4 and 6 are longitudinalsections 'taken .approximately on the lines 4-4 andS-B, respectively, of Figure 3 and are drawn 'to enlarged scale, and

Figure 5 is a transverse vertical section l'taken approximately on line 5 5 of Figure 2.

The portable rail punch comprises a substantially U-shaped frame l provided with a handle la and having a screw 2 threaded into one of its legs Ib and mounting a punch 3 for movement towa-rds a die d attached to the other leg Ic of frame I. Punch 3 and die l! cooperate to punch holes in a rail 5.

Screw 2 may be rotated in either direction by a ratchet E comprising a toothed nut I rigid with screw 2 and forming the driven member of the ratchet. The driving member of the ratchet includes a body part 8 provided with a circular aperture 9 receiving nut v1 and provided with V- shaped recesses IAG opening off of aperture 9 lfor receiving pawls II and I2. Pawls Ii and I2 are mounted on a rod I3 slidable lengthwise in aligned openings I4' in body parts 8. Pawls ii and l2 pivot about their inner ends in vrecesses .forming the driven member.

I0 and are urged toward one another by a spring I5. A U-shaped element 13a has its legs extending transversely through rod I3 and engages the opposing faces of pawls II and I2 so that when the rod is moved to the position shown in Figure 5, the upper leg of element i3d `engages pawl I2 and .moves it away from nut '1. At the same time, the lower leg of element vI3a releases pawl I I and permits spring l5 to move pawl II into engagement with nut When rod |73 is moved downwardly, pawl Il will be moved by element I3a out of engagement with nut l to permit spring I5 yto move pawl I2 into 4engagement with Vnut l to reverse the Ydirection of operation of the ratchet. A11-operating arm I6 is rigid with vbody part 8 of ratchet `6. The structure vdescribed is similar to the structure shown in applicants earlier patent.

Arm I6 is actuated by manual operation of a ratchet I8 anchored to frame I. Ratchet i3 moves a threaded rod Il lengthwise and rod I1 is pivoted to arm Iii by a pin Ila. The axis of rod Il' is disposed substantially `at right angles to the axis of arm t6, andthe axis of ratchet Iii and .rod Il is disposed at substantially right angles to the axis or ratchet 8 and screw 2.

Ratchet I8 is similar to that described above and includes a vbody part 20 forming the driving mem-ber ,and a nut I5 threaded on rod VIl and Nut I9 is seated en a ball bearing assembly VZI for rotation relative to a collar 22 having an arm 23 received in -a socket -24 in the frame and parallel to the axis .of screw 2. Arm 23 is mounted in socket 2t to pivot about its axis `and to slide parallel to the axis of screw 2. Body part 20 of ratchet I'8 vhas a rig-id Voperating arm 25. A sleeve 26 has in- -wardly extending iianges 2l, 2d which engage collar 22 and an voutwardly extending flange 29 on nut it, respectively, and maintains assembly of nut I9, ball bearing assembly 21 collar 22. With this arrangement, ratchet Il?, is ancho-red 'against movement toward and away from ratchet E and its operating arm, but ratchet I2 may pivot about the axis oi arm 23 and may move parallel to the axis `of screw '2 to accommodate movement of vscrew 2 relative to frame I.

By exerting a relatively lsmall force on arm 25 and rotating it in a clockwise direction, indicated .by the arrow in Figure l, nut I9 is rotated in a clockwise `direction vand moves screw I? upwardly and rotates ratchet 6 `and screw 2 in a clockwise direction, as indicated by the arrows in Figure 3, and advances punch '3 towards die 4. `Arm 23 and the vassociated mechanism pivots relative to frame I and moves toward frame I parallel to screw 2 so that arm I6 and rod II are in substantially the same transverse plane.

In the preferred arrangement, the lengthwise travel of rod II is suflicient to rotate the driving member of ratchet E through an angle equivalent to one tooth. After rod I'I is moved this distance, ratchets 6 and I8 are adjusted for reverse operation and rod I1 and arm I6 are moved in the opposite direction by ratchet I8 without reversing screw 2. After rod I'I is moved downwardly sufciently for the driving member of ratchet 6 to engage the next tooth on nut l, ratchets 6 and I8 are adjusted again for forward operation and punch 3 is advanced toward die 4 as described above.

Screw 2 preferably is provided with double threads to increase the strength of the device and to advance die 3 toward punch 4 without excessive operation of ratchet I8. A bar 29 may be inserted through a hole 30 in the end of screw 2 to facilitate adjusting punch 3 relative to die 4 when mounting or removing a rail 5 from the rail punch.

The construction described may be varied substantially without departing from the spirit of the invention, and the exclusive use of those modifications coming within the scope ofthe claims is contemplated.

What I claim is:

1. In a device of the kind described, a rigid frame, a die seated thereon, a tool opposing said die, a screw device threaded in said frame and arranged to move said tool toward said die, an I elongated operating arm for rotating said screw and extending substantially at right angles to the axis of said screw, a screw mechanism operatively connected to said arm and anchored to said frame whereby operation of said screw mechanism operates said arm and rotates said screw and moves said tool toward said die.

2. A device as described in claim 1 in which the longitudinal axes of said screw and said screw mechanism are disposed at approximately right angles to one another.

3. In a device of the kind described, a rigid frame, a die seated thereon, a tool opposing said die, a screw threaded in said frame and arranged for moving said tool toward said die, a ratchet mechanism operatively connected to said screw and including an operating arm, a threaded rod connected to said arm` and means for actuating said threaded rod and anchored to said frame against movement toward and away from said ratchet mechanism.

4. A device as described in claim 3 in which said means pivots relative to said frame and in which said rod and said operating arm are connected for relative pivotal movement and are normally positioned approximately at right angles to one another.

5. In a device of the kind described, a rigid frame, a die seated thereon, a tool opposing said die, a screw threaded in said frame and arranged for moving said tool toward said die, a ratchet mechanism operatively connected to said screw and including an operating arm, a rod connected to said arm, and a ratchet device for actuating said rod longitudinally and anchored to said frame against movement toward and away from said ratchet mechanism, the advance of said screw being less than the advance of said rod.

6. In a device of the kind described, a frame, a die seated on said frame, a pair of screws, a

ratchet operatively connected to each of said screws, one of said screws being threaded into said frame and seating a tool opposing said die, the ratchet of the other screw being anchored to said frame against axial movement and said other screw being arranged for lengthwise movement relative to the frame and operatively connected to the ratchet of the frame threaded screw whereby when said frame anchored ratchet is operated, said frame threaded screw advances relative to said frame and moves said tool toward said die.

7. A device of the kind described comprising a rigid frame, a screw threaded in said frame, a ratchet mechanism to advance said screw in said frame, a member anchored to said frame, a threaded rod associated with said member and being operatively connected to said ratchet mechanism, and means to advance said rod relative to said member to operate said ratchet mechanism and rotate said iirst mentioned screw in said frame.

8. Structure of the kind described in claim 7 in which the advancing movement of the rod provides for rotation of the screw through an angle equivalent at least to a single advance of the ratchet mechanism.

9. A device of the kind described comprising a frame, a screw threaded in said frame, a ratchet operatively connected to said screw, a rod operatively connected to said ratchet, a member associated with said rod and anchored to said frame against movement towards and away from said ratchet, but pivoted on said frame and movable bodily thereon parallel to the axis of said screw, there being means to advance said rod relative to said member to advance said screw in said frame.

10. A device of the kind described comprising a rigid frame, a screw threaded in said frame and having an arm operatively connected thereto, a threaded rod connected to said arm, a member anchored to said frame and associated with said rod, and means to advance said rod relative to said member to rotate said arm and advance said screw in said frame.

11. In a device of the kind described, a frame, a screw threaded in said frame, an oscillating mechanism operatively connected to said screw to rotate said screw relative to said frame, a threaded rod connected to said oscillating mechanism, a member anchored to said frame against movement toward and away from said oscillating mechanism but movable on said frame parallel to the axis of said screw and also movable about a pivot parallel to said screw axis, an oscillating device threaded on said rod and seated on said member and arranged to advance said rod relative thereto to operate said oscillating mechanism and to rotate said screw relative to said frame.

12. In a device of the kind described, a frame, a screw threaded in said frame, an oscillating mechanism to rotate said screw, a socket in said frame parallel to said screw, an elongated bar received in said socket for movement pivotally and lengthwise of said socket, a mounting on said bar and held thereby against movement toward said screw, a rod connected to said oscillating mechanism, and means associated with said mounting to advance said rod relative to said mounting to actuate said mechanism and to advance said screw in said frame.

13. In a device of the kind described, a frame, a screw threaded in said frame, an oscillating mechanism operatively connected to said screw to rotate said screw relative to said frame, a threaded rod connected to said oscillating mechanism, means for advancing said rod relative to said frame and anchored to said frame against movement toward and away from said oscillating mechanism, there being means to rotate said screw independently of rotation by said rod.

14. In a press of the class described, a frame, a tool feeding screw threaded therein, an oscillating ratchet for rotating said screw and including an operating arm, a screw for actuating said arm, and an oscillating ratchet supported by said frame for actuating said last-mentioned screw and oscillating said rst mentioned ratchet.

15. In a device of the class described, a frame, a tool mounting including a screw threaded on said framea ratchet and pawl structure operatively connected to said screw to rotate it relative to said frame and including an actuating lever, a carrier anchored to said frame against movement toward and away from said screw but REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 237,178 Goss Feb. 1, 1881 1,705,461 Nelson Mar. 12, 1929 1,783,250 Manley Dec. 2, 1930 2,202,514 Benner May 28, 1940 2,222,064 Benner Nov. 19, 1940 

